A new method which allows the 3-D reconstruction of vertebral body endplates from biplanar radiographs was developed in order to evaluate the maximum wedge angulations of scoliotic vertebrae and their corresponding 3-D orientations. This new reconstruction technique, based on an iterative projectionretroprojection procedure which fits an ellipse on the real endplate contours, was applied on 10 adolescent idiopathic scoliotic patients. Results at thoracic apex show mean wedge angles of 9.1±4.5°. Wedging orientation values confirmed that scoliotic wedging is not a 2-D deformation but a 3-D phenomenon because it did not occurred in a plane parallel to the frontal X-ray plane. Preliminary validation showed maximum wedge angle errors less than 2.5°.